Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ecdcc03c832bba…

MALICIOUS

PDF

44.2 KB Created: 2020-08-15 00:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 784c284261cae7990303cadd832ffba6 SHA-1: 0d2454cd7d90bd24cad031fd1c901db89771b648 SHA-256: f8ecdcc03c832bbadb012fefaa061bfbd17eb8dc89695544650e77d3993016c2
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=borderlands+3+amara+skill+guide'. This URL is presented within the document body, disguised as a game guide, to entice users to click. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to benign Shopify domains but including at least one other potentially malicious domain. The primary malicious URL is the most critical IOC.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=borderlands+3+amara+skill+guide
    • http://files.kcdisciples.org/uploads/1/3/1/3/131397927/dad83717723.pdf
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/entrepreneurship_development_for_bba.pdf
    • https://cdn.shopify.com/s/files/1/0438/0763/7661/files/29028401879.pdf
    • https://cdn.shopify.com/s/files/1/0431/1393/9110/files/omnitech_shredder_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/45804116013.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/codex_basiliensis.pdf
    • https://cdn.shopify.com/s/files/1/0434/5036/8152/files/30496560642.pdf
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/janokokofidativinatub.pdf
    • https://cdn.shopify.com/s/files/1/0428/8980/5980/files/25188956699.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/94973653876.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7017/files/80755890913.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/61202540179.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/talladega_nights_script.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c9d.bin
36530215ac871cf99090594f0725ae1309f4d7ca337276fa866e9415692f6678		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9D 5420 bytes
font_01_sfnt_off00007ef5.bin
b69fb151fbcf42768467f59ee73c6f13f1d234639365e08fe111abfac7ef6116		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF5 10328 bytes

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